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Early life imprints the hierarchy of T cell clone sizes.

ABSTRACT: The adaptive immune system responds to pathogens by selecting clones of cells with specific receptors. While clonal selection in response to particular antigens has been studied in detail, it is unknown how a lifetime of exposures to many antigens collectively shape the immune repertoire. Here, using mathematical modeling and statistical analyses of T cell receptor sequencing data, we develop a quantitative theory of human T cell dynamics compatible with the statistical laws of repertoire organization. We find that clonal expansions during a perinatal time window leave a long-lasting imprint on the human T cell repertoire, which is only slowly reshaped by fluctuating clonal selection during adult life. Our work provides a mechanism for how early clonal dynamics imprint the hierarchy of T cell clone sizes with implications for pathogen defense and autoimmunity.

SUBMITTER: Gaimann MU

PROVIDER: S-EPMC7870140 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature

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Early life imprints the hierarchy of T cell clone sizes.

Gaimann Mario U MU Nguyen Maximilian M Desponds Jonathan J Mayer Andreas A

eLife 20201221

The adaptive immune system responds to pathogens by selecting clones of cells with specific receptors. While clonal selection in response to particular antigens has been studied in detail, it is unknown how a lifetime of exposures to many antigens collectively shape the immune repertoire. Here, using mathematical modeling and statistical analyses of T cell receptor sequencing data, we develop a quantitative theory of human T cell dynamics compatible with the statistical laws of repertoire organi ...[more]

PMID: 33345776

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